When Gary is struck by lightning as he passes through the time portal in 1945, two clones of him suddenly appear - a selflessly good Gary and a pathologically evil Gary. The suave evil duplicate begins causing a stir in both of Gary's lives, yet while Yvonne and Ron prefer Gary's evil alter ego, Phoebe is alienated by his aloof behaviour.

Both of Gary's wives have their hearts set on starting new lives in California, but Gary knows he can't live that far from the time portal and must find a way to dissuade Phoebe and Yvonne from such drastic life changes. Meanwhile, in 1945, Reg is forced into retirement from the police force and is extremely disheartened when nobody turns up for his leaving party.